Chemical weapons are banned by most nations of the world, though Syria isn't one of them. It's still unclear, though, what countries can do when other countries use chemical weapons. What's becoming more clear, though, is that there's still not an easy legal justification for military strikes on Syria.

When it comes to chemical weapons, one thing is clear: You're not allowed to use them. There's an internationalreaty banning them. What the treatyesn't say is what should happen if a nation does use chemical weapons.

When it comes to chemical weapons, one thing is clear: You're not allowed to use them. There's an internationalreaty banning them. What the treatyesn't say is what should happen if a nation does use chemical weapons.

Chemical weapons are banned by most nations of the world, though Syria isn't one of them. It's still unclear, though, what countries can do when other countries use chemical weapons. What's becoming more clear, though, is that there's still not an easy legal justification for military strikes on Syria.